Design, fabrication and characterisation of a microfluidic time-Temperature indicator

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Abstract

This paper describes a concept for a passive microfluidic time-Temperature indicator (TTI) intended for intelligent food packaging. A microfluidic system is presented that makes use of the temperature-dependent flow of suitable food ingredients in a microcapillary. Based on the creeping distance inside the capillary, the time-Temperature integral can be determined. A demonstrator of the microsystem has been designed, fabricated and characterised using liquid sugar alcohols as indicator fluids. To enable a first wireless read-out of the passive TTI, the sensor was read out using a commercial RFID equipment, and capacitive measurements have been carried out.

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Schmitt, P., Wedrich, K., Müller, L., Mehner, H., & Hoffmann, M. (2017). Design, fabrication and characterisation of a microfluidic time-Temperature indicator. In Journal of Physics: Conference Series (Vol. 922). Institute of Physics Publishing. https://doi.org/10.1088/1742-6596/922/1/012004

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